• Qtalis K803 GNSS Module Top View
  • Qtalis K803 GNSS Module with Quantum III Chipset
  • Qtalis K803 GNSS Module for High Precision
  • Qtalis K803 GNSS Module with IMU
  • Qtalis K803 GNSS Module for Marine Navigation
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Qtalis

K803 GNSS Module

Full-Constellation Triple-Frequency GNSS/INS Module with Built-In IMU

K803 GNSS Module

$119.00 USD
$119.00 USD
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Shipping calculated at checkout.
ⓘ

Volume Pricing & OEM Support

Bulk pricing, OEM customization, and system integration.

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  • 1-Year Warranty
  • Engineering Support

The K803 GNSS Module is a full-constellation, triple-frequency module with a built-in high-precision IMU, delivering superior positioning performance in a compact design. Engineered for UAVs, robotics, marine navigation, deformation monitoring, land surveying, IoT, GIS, GBAS, personnel positioning, and machine control, the K803 ensures reliable, centimeter-level accuracy across diverse applications.

Key Features

  • Support GPS L1/L2/L5, BeiDou B1/B2/B3, GLONASS L1/L2, Galileo E1/E5a/E5b, QZSS, IRNSS, SBAS, BeiDou Global Signal B1C, B2a, B2b
  • Support L-Band and PPP
  • Support GNSS+INS navigation
  • Surface-mounted design and small size to integrate
  • High-performance floating-point arithmetic
  • Industry-leading low power consumption
  • Internal adaptive anti-interference algorithm

Certifications
CE / FCC / ROHS Certificate

Helpful Documentation

📄
Datasheet
📘
Manual
View full details

Application

Designed for high-precision positioning in demanding environments.

  • 5 stars: 1 (20%)
  • 4 stars: 3 (60%)
  • 3 stars: 1 (20%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
P
Pierre Dubois
Great Value for a Triple-Frequency GNSS Module

Very impressed with the K803's positioning performance. Triple-frequency GNSS and built-in IMU give us reliable centimeter-level results, while the module remains compact and power efficient. The price is also quite competitive compared with similar solutions.

C
Carlos Mendes
Good performance but power consumption could improve

Strong performance and best accuracy, but the power consumption is a bit high.

Thanks Carlos! The new generation K9 series provides much lower power consunption.

M
Mark D
Solid RTK module, great support

The K803 works perfectly for our rover setup. It hits the 20Hz output consistently without dropping data, which is exactly what we needed. I'm giving it 4 stars instead of 5 because the initial configuration took a bit longer than expected. I had to reach out to tech support to figure out the NMEA message rates. However, their team replied within a few hours and gave me the exact serial commands. Shipping was also pretty fast to Germany.

Hi Mark, thank you for your honest review! We're glad the K803 is meeting your 20Hz requirement and that our support team could help you get it sorted out. We are currently working on a more detailed quick-start guide to make the initial configuration even easier for our users.

L
Lucas Garcia
Classic model

K803 is always my best solution, i used K803 several years, it is the classic and strongest model

Thank you, Lucas! Very gload to hear that.

M
Matteo Rossi
Pretty good

Accuracy is solid, but the software interface looks a little bit ugly. Still performs well in our testing and meets project requirements.

Satellites trackingGPS: L1C/A, L2C, L2P, L5, L1C
BeiDou BDS-2: B1I, B2I, B3I
BDS-3: B1I, B3I, B1C, B2a, B2b
GLONASS: G1, G2, G3
Galileo: E1, E5a, E5b, E6c, E5 AltBOC
QZSS: L1C/A, L2C, L5, L1C
SBAS: L1C/A, L5
NavIC: L5
L-Band
Post Processing2.5 mm + 1 ppm Horizontal
5 mm + 1 ppm Vertical
Single Baseline RTK8 mm + 1 ppm Horizontal
15 mm + 1 ppm Vertical
DGPS<0.4 m RMS
SBAS1 m 3D RMS
Standalone1.5m 3D RMS
Cold start<20 s
Hot start<10 s
RTK Initialization time<10 s
Signal reacquisition<1 s
Initialization reliability>99.9%
Velocity accuracy≤ 0.02 m/s
Acceleration4 g
Overload15 g
Time accuracy20 ns
Size (L x W x H)73.5 mm × 100 mm × 22 mm
Weight82.5g
Hardware interface1.6 pin,2.5mm
Power consumption1.5 W
Input voltage+5-12V DC
Operating temperature-40 °C to + 85 °C
Storage temperature-55 °C to + 95 °C
LNA Power External+3.3V ~ +5V ± 5%VDC @ 0-100mA
LNA Gain20 ~ 40dB (suggested)
Impedance MatchingWiring 50 Ω impedance matching
LVTTL ports1XRS232, 3XLVCMOS
BT1
Event Markers input2
Pulse Per Second (PPS) output1
GPIO2
Correction data I/ORTCM 2.X, 3.X, CMR(GPS only), CMR+(GPS only)
Position data output- ASCII: NMEA-0183 GGA, GSA, GSV, RMC, HDT, VHD, ZDA, VTG, GST, GLL; PTNL, PJK; PTNL, AVR; PTNL, GGK
- ComNav Binary
- BINEX Data: 0x00, 0x01-01, 0x01-02, 0x01-05, 0x7d-00, 0x7e-00, 0x7f-05
- Position data output rate: 1 Hz, 2 Hz, 5 Hz, 10 Hz, 20Hz
Note:
Items marked with *are only support by specific firmware